Gassendi:
One of the real wonders of the Moon, Gassendi is a spectacular walled plain
67-miles across located on the north shore of Mare Humorum. The northern wall is
home to Gassendi A, a 20-mile diameter crater that is interesting in its own
right. To the north of "A" is "B," which is detached from A
and which appears to have been partially filled with lava. B is about 15 miles
in diameter. The big attraction here is, of course, the complex system of rilles
that criss-cross the floor of the main crater. The better your seeing, the more
detail seems to appear. The central peak is composed of three main peaks, the
tallest of which reaches an altitude of 12,000 meters.